Ampcontrol Gasguard GG2 DISPLAY, User Manual

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Ampcontrol Pty Ltd
– ABN 28 000 915 542
GG2 DISPLAY USER MANUAL
GG2B023 Version 3
– JUNE/19
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version Page 65 of 82
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7
REMOTE OPERATION
The GG2 Display supports two-way communication over a Modbus or iMAC system.
7.1 GG2 Detector Type Table
Table 16: GG2 Detector Type Table
Gas
Type
Detector
Technology
Measurement Range Ampcontrol Part
Numbers
CH4 Catalytic 0-5% v/v 177871
CH4 IR 0-5% v/v 177870
CO2 IR 0-2% v/v 180734
CO2 IR 0-5% v/v 180733
CO Electrochemical 0-50ppm 177873
CO Electrochemical 0-100ppm 177874
O2 Electrochemical 0-25% v/v 177872
7.2 Modbus
Register Map
All values can be assumed to be the Modbus default endianness, big-endian. Any exceptions to this will
be noted in the Format column.
7.2.1.1 Safety Registers
Register Description R/W Detail Format
1
Detector gas reading permyriad
- unaffected by telemetry test
R
Permyriad of full scale, see
Gas Reading Units6.4.1
Signed Int
2
Bit-inverted Detector gas
reading permyriad - unaffected
by telemetry test
R
Permyriad of full scale, See
Gas Reading Units6.4.1 Signed Int, bit
inversion
3 Heartbeat R
Increments on each cycle,
nominally every 100ms.
Unsigned Int
4 RESERVED
7.2.1.2 Operational Registers
Register Description R/W Detail Format
5
Detector gas reading permyriad
- may be forced by telemetry
test. R
Permyriad of full scale, see
Gas Reading Units6.4.1
Signed Int
6
– bit 0
SP1 flag R 1 = flag set bit
6
– bit 1
SP2 flag R 1 = flag set bit
6
– bit 2
SP3 flag R 1 = flag set bit
6
– bit 3
Cal cup on R 1 = cup on bit
6
– bit 4
Calibration due (every 6
months)
R 1 = calibration due bit
6
– bit 5
T90 test due (every 31 days) R 1 = T90 test due bit
6
– bit 6
Detector present R 1 = detector present bit
6
– bit 7
4-20mA loop activation R 1 = 4-20mA loop active bit